Osisko Mining Inc. (TSX:OSK) ("Osisko" or the "Corporation") is pleased to announce that drilling has commenced on the 1400 metre step out line northeast from the main Windfall deposit at its 100% owned Windfall Lake gold project located in Urban Township, Québec. Recent drilling on the 200 metre, 400 metre and 600 metres step out lines have significantly extended the known area of gold mineralization at Windfall (see Osisko press release dated January 11, 2017). The 800 metre step out line is currently being drilled and the new fence of drill holes on the 1400 metre line is designed to explore the potential of the northeast-trending linear magnetic low an additional 800 metres beyond the last mineralized intercept (DDH OSK-W-16-760).
Two additional exploration holes will also soon commence on a NNE-trending fault interpreted as a splay of the Windfall structure and which is also characterized by zones of magnetic depression. One is located under Windfall Lake, 2.8 kilometres north of the deposit, the second hole is located 1.9 kilometres WSW of the deposit.
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Jean-Philippe Desrochers, Ph.D., P.Geo. Senior Project Manager of the Windfall Lake gold project, who is a "Qualified Person" as defined by National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101").
About the Windfall Lake Gold Deposit
The Windfall Lake gold deposit is located between Val-d'Or and Chibougamau in the Abitibi region of Québec, Canada. The current mineral resource comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015 entitled "Preliminary Economic Assessment of the Windfall Lake Gold Property, Québec, Canada" with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main Zone, a southwest/northeast trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres, and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and down-plunge and at depth.